Bolverk

Bolverk is the demon warrior who once fought against Sparda. He fights with an extendable spear and an aura of darkness, and his single eye possesses both knowlege and malice. He is the boss for Mission 11 and Mission 16 of Dante's scenario in Devil May Cry 2. He is a skeletal demon warrior who is driven to seek revenge against Sparda's heir, Dante. He is served by Freki & Geri, two wolf-like servant-demons that may be reincarnated figures of warriors whom Bolverk fought alongside.

Devil May Cry 2
After Dante first defeats Freki and Geri before entering the streets of Uroboros City, they returned to Bolverk, waiting atop a skyscraper. Bolverk later reappears in the underground Ruin, where he challenges Dante to a duel. Dante chases him off and continues through the ruin, eventually meeting with Lucia. Bolverk later reappears as Dante climbs Arius's tower, and this time Dante destroys him. It is not made clear if Bolverk serves Arius or not.

Strategy
As a boss, Bolverk fights in a very similar way to Nelo Angelo's.

Background
In Norse Mythology, Bolverk is an alias Odin once took while masquerading as a human. Freki and Geri are two wolves that acted as companions to Odin.